QuantumSpecs

Shiba Lattices in Supramolecular Assembly / superconductor hybrids

Dimitri Roditchev — 2018-09-28T09:08:40Z

projet Stephane

- Research Topics

Graphene/Ir intercalated with FM atoms

Dimitri Roditchev — 2018-09-28T08:47:52Z

associé au projet de Sergio et Thomas

- Research Topics

attach aux principes de base

Dimitri Roditchev — 2016-01-11T10:47:50Z

- Bases théoriques / Invisible

ARPES

Dimitri Roditchev — 2016-01-11T10:23:55Z

To know a bit more about the ARPES technique : The ARPES technique is a photon-in, electron-out technique performed on conducting samples with UV light. It is a surface technique because of the short mean free path of the photoelectrons in the sample. Thus, the experiment has to be performed in ultrahigh vacuum (UHV) to avoid contamination with cleaved samples or freshly prepared surfaces. The analysis of the kinetic energy and angles (polar, azimuthal and tilt) of emission of the (…)

- Underlying basic principles

STM STS

Dimitri Roditchev — 2016-01-11T10:22:58Z

The principle of the STM is apparently simple : A sharp metallic tip is placed very close, around one nanometer away from the surface of the studied sample. At such a short distance the quantum tunneling phenomenon occurs : since the electron wave-functions have a rapid yet finite decay in vacuum, often referred to as “evanescent waves”, the electrons from the tip can “tunnel” through the tiny vacuum space into the surface. At such a tunnelling condition, if a small voltage difference is (…)

- Underlying basic principles

Electrons in solids

Dimitri Roditchev — 2016-01-11T10:21:57Z

1. Quantum particle-in-the-box model by Sommerfeld.
The very first description of electrons in a solid was suggested by Sommerfeld who treated the electrons in a metal as quantum particles - fermions - put in a box
..work in progress..
2. Nearly free electron gas. Energy gap opening.
3. Peierls transition.
4. Superconductivity.
5. Spin-orbit interactions. Rashba splitting.

- Underlying basic principles

Spectroscopy of electronic properties of solids

Dimitri Roditchev — 2016-01-11T09:44:01Z

We describe here basic principles of electronic properties of solids as well as two spectroscopies we use to probe them : Scanning Tunneling Microscopy and Spectroscopy (STM/STS) and Angle-Resolved Photo-Emission Spectroscopy (ARPES). Both methods are surface-sensitive and therefore have to be used in ultrahigh vacuum to avoid contamination. Electrons in solids : From free electrons to correlated systems
Unlike free electrons moving in vacuum, the electrons in solids strongly interact (…)

- Underlying basic principles / Invisible

Nouveau : S-Hybrids Workshop !

Dimitri Roditchev — 2014-12-05T10:21:07Z

- Nouveau : S-Hybirds Workshop ! / Invisible

Welcome

Dimitri Roditchev — 2014-12-03T19:41:49Z

- Welcome / 01 - MenuHaut

Bienvenue

Dimitri Roditchev — 2014-12-03T16:38:54Z

- Bienvenue / Invisible, 01 - MenuHaut